From rotoworld:
WBC officials are expected to uphold the Mariners' objection and prohibit Felix Hernandez from competing in this spring's event, a source with knowledge of the process told the Seattle Post-Intelligencer.
The Mariners don't want to take any chances with the 19-year-old. "Our belief is that he's too young," Mariners president Chuck Armstrong said last week. "With his age, when you're playing for your flag, it creates a lot of adrenaline, a lot of emotion. He just needs to get prepared for this season." Dec. 12 - 4:48 am et
Source: Seattle Post-Intelligencer

As a Felix owner, I'm pleased. I'm just curious though, whether stuff like this will tick the players off. Talk about paternalism.

I remember looking at his innings so far in his career and thinking that they have done a pretty good job of taking care of his arm so far. The M's wanted to cap him at 195 last year and he only threw 175. He only avg 14.4 pitches/inning in the majors which is a really low total. I'm glad they are holding him back. I want to see this guy develop into the dominant pitcher everyone thinks he can be.